Shopify password update using Shopify API

        PUT /admin/customers/#{id}.json
    {
      "customer": {
        "id": 207119551,
        "password": "newpass",
        "password_confirmation": "newpass",
        "send_email_welcome": false
      }
    }

If You want to update password of your store's customer using shopify Api then yes it is possible. Here is Sample Code:-

$password = array(
          "customer"=>array(
              'id'=>$customerid,
              'password'=> $new_password,
              'password_confirmation'=>$confirm_password    

          )
      );
$customer = $shopify("PUT /admin/customers/$customerid.json" , $password);

You can update shopify store's customer password this way. But if you are talking about user then this API us only available for shopify plus store.check this link:- https://help.shopify.com/api/reference/plus/user

Thanks

NO,

Still in 2019 it is not possible it is just read only. Even you can visit this link

If you want to update the password of your user using the shopify API please try to use the below code:-

$updatePassword = array(
          "customer"=>array(
              'id'=>$userId,
              'password'=> $updatedPassword,
              'password_confirmation'=>$confirm_updatedPassword,
              'send_reset_password_email': true    

          )
      );
$updateCustomer = $shopify("PUT /admin/customers/$userId.json" , $updatePassword);